—So you know Della?—Yes,it was last week I surfed the Internet.A．that B．when C．why D．whom—So you know Della?—Yes,it was last week _____ I surfed the Internet.\x05A．that \x05\x05\x05\x05B．when\x05\x05\x05\x05C．why\x05\x05\x05\x05

—So you know Della?—Yes,it was last week I surfed the Internet.A．that B．when C．why D．whom—So you know Della?—Yes,it was last week _____ I surfed the Internet.\x05A．that \x05\x05\x05\x05B．when\x05\x05\x05\x05C．why\x05\x05\x05\x05
—So you know Della?—Yes,it was last week I surfed the Internet.A．that B．when C．why D．whom
—So you know Della?
—Yes,it was last week _____ I surfed the Internet.
\x05A．that \x05\x05\x05\x05B．when\x05\x05\x05\x05C．why\x05\x05\x05\x05D．whom

—So you know Della?—Yes,it was last week I surfed the Internet.A．that B．when C．why D．whom—So you know Della?—Yes,it was last week _____ I surfed the Internet.\x05A．that \x05\x05\x05\x05B．when\x05\x05\x05\x05C．why\x05\x05\x05\x05
选择B,这里是是个when引导时间状语从句,如果
last week前面有介词in,那么就是强调句了,强调时间last week,此时选择A中的that